System Cooling has the PolarFlo Waterblock up for review. Looks a bit like Cathar's
WW... Take a look here
how it performs.

While the majority continues to air-cool their computers, water-cooling
is slowly attracting new enthusiasts weekly. Competing for this growth are the
well-known, mainstream manufacturers who continue to offer improved products,
and relatively unknown manufacturers offering new products. We have one such
product today, the PolarFLO water block by the Horse of Iron.